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protect/map shenanigans with macOS

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lizzie
2025-11-30 22:48:52 +00:00
parent 816eb96f48
commit c1fc6dcfe0
1 changed files with 9 additions and 2 deletions
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src/common/host_memory.cpp
+9 -2
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@@ -629,8 +629,9 @@ public:
u8* addr = virtual_base + virtual_offset; u8* addr = virtual_base + virtual_offset;
#ifdef __APPLE__ #ifdef __APPLE__
// The way Steve Jobs intended // The way Steve Jobs intended
addr = (void*)trunc_page(u64(addr)); addr = (u8*)trunc_page(u64(addr) + host_offset);
length = round_page(length); length = round_page(length);
host_offset = 0;
#endif #endif
void* ret = mmap(addr, length, prot_flags, flags, fd, host_offset); void* ret = mmap(addr, length, prot_flags, flags, fd, host_offset);
ASSERT_MSG(ret != MAP_FAILED, "mmap: {}", strerror(errno)); ASSERT_MSG(ret != MAP_FAILED, "mmap: {}", strerror(errno));
@@ -665,7 +666,13 @@ public:
if (execute) if (execute)
flags |= PROT_EXEC; flags |= PROT_EXEC;
#endif #endif
int ret = mprotect(virtual_base + virtual_offset, length, flags); u8* addr = virtual_base + virtual_offset;
#ifdef __APPLE__
// The way Steve Jobs intended
addr = (u8*)trunc_page(u64(addr));
length = round_page(length);
#endif
int ret = mprotect(addr, length, flags);
ASSERT_MSG(ret == 0, "mprotect failed: {}", strerror(errno)); ASSERT_MSG(ret == 0, "mprotect failed: {}", strerror(errno));
} }